A B
Р
D
С
ABCD is a parallelogram.
ABP and QDC are straight lines.
Angle ADP = angle CBQ = 90°
(a) Prove that triangle ADP is congruent to triangle CBQ.
[3 marks]

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Suppose that 15 inches of wire cost 60 cents. at the same rate, how much (in cents) will 12 inches of wire cost